CN101725753B - Dislocable and resettable gear transmission mechanism of electric control valve - Google Patents
Dislocable and resettable gear transmission mechanism of electric control valve Download PDFInfo
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- CN101725753B CN101725753B CN2009101553699A CN200910155369A CN101725753B CN 101725753 B CN101725753 B CN 101725753B CN 2009101553699 A CN2009101553699 A CN 2009101553699A CN 200910155369 A CN200910155369 A CN 200910155369A CN 101725753 B CN101725753 B CN 101725753B
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Abstract
The invention discloses a gear transmission mechanism applied to an electric control valve, belonging to the technical field of valves and comprising a decelerating gear group, wherein gears on the low-speed end of the decelerating gear group are assembled on a valve rod. The gear transmission mechanism is characterized in that the gears on the low-speed end of the decelerating gear group are fan-shaped gears; and in addition, the gear transmission mechanism also comprises a rotary driving mechanism used for resetting dislocated fan-shaped gears. The shapes of the gears on the low-speed end are changed for disconnecting the transmission mechanism at proper time, thereby effectively avoiding the blockage problem of an electromotor. Therefore, the problems of electromotor burn, tooth pressure and the like directly caused by the blockage rotation of the electromotor are solved. At the same time, the improved structure provides the possibility of applying plastic gears, thereby directly reducing the cost of the material of the gear group and obviously reducing the processing cost of the plastic gears compared with metal gears.
Description
Technical field
The invention belongs to valve technology field, relate to a kind of electric-controlled type valve, a kind of specifically gear drive that is applied to electrically-controlled valve.
Background technique
Along with the reach of science, the electric-controlled type automatic valve begins to be widely used in the productive life.In the prior art, electrically-controlled valve generally comprises motor, train of reduction gears, valve body, valve rod and spool, and the low speed end tooth wheel of described train of reduction gears is assemblied on the described valve rod, perhaps directly described valve rod is made into gear shaft.Described motor is by the switch of train of reduction gears control spool, and described motor is by control circuit control start-stop and clockwise and anticlockwise.
Under perfect condition, be to calculate in theory by accurate, set accurately the motor power-on time realizing, in just motor stall during throttle down fully of spool.Yet in the reality, owing to have the multi-stage gear driving error in the transmission process, the influence of the factors such as rotator inertia when stopped by the starting speedup process rotating speed change of motor and motor is difficult to realize the accurate control to spool.Even if realized the accurate setting of motor operating time,, after use a period of time, can cause the spool existing picture of throttle down fully too because gear train produces wearing and tearing at work by the high-tech ment.
The problem of exist actually hereto, solution of the prior art is to set the longer motor operating time.Motor is worked on a period of time in theory, so that guarantee in fact throttle down of spool behind the throttle down at spool.This solution only pipe has solved problem in to a certain degree, still, also exist at least one key issue, and promptly motor can be forced to stall after the spool stall.At this moment, on the one hand, because control circuit is equivalent to generation the locked rotor current more than four times of normal current still to the motor power supply in motor winding, coil generates heat in a large number, burns motor easily; On the other hand, during owing to the motor stall, bearing very big pressure on the engaging tooth of gear train, performance is particularly evident on low speed end tooth wheel.For fear of strength of gear teeth deficiency, cause teeth to be damaged.People can only adopt the high strength gear of metal in electrically-controlled valve.Yet, because the processing and assembling process of metal gear complexity, and in recent years, along with mineral resources reduce, Yu of metallic material adds valuable.The use of metal gear has but brought very serious expensive problem.
Solve the above-mentioned problem of being brought because of the motor stall, can be respectively from following three angles:
The first, at motor.Use the locked rotor current of fractional electric motor when effectively reducing the motor stall as far as possible.But when spool or valve rod are hindered because of dust impurity, vacation might occur and close phenomenon.Even if the motor power (output) that uses is very little, during stall, low speed end tooth wheel teeth are equally being born the unaffordable heavy burden of nonetallic gear.
The second, at driving mechanism.Set about from the structure of driving mechanism, design a kind of special structure, when the realization valve open or after closing, a certain parts of driving mechanism break away from the post, and transmission line is disconnected.Like this motor with regard to can not be because of stopping of spool stall, the gear of gear train also no longer bears excessive pressure.But how to realize the in good time disconnection of this transmission line, UNICOM in needs is a difficult problem again, and is directed to different valve core structures, and the mode of realization will have nothing in common with each other.
The 3rd, at spool.By the switching spool detection device being set, cooperate control circuit directly to control the motor power on/off by the switching spool detection device at spool or valve rod place.When spool opened or closed fully, detection device sent signal, was directly stopped motor being powered by control circuit.This mode deficiency of dealing with problems is complex structure, and cost up.
Summary of the invention
At the above-mentioned shortcoming that exists in the prior art; the present invention is from improving the angle of driving mechanism; train of reduction gears at existing electrically-controlled valve provides a kind of improvement structure; can disconnect the transmission of power when valve open or after closing from gear train low speed end; and then the problem of solution motor stall, realize protection to motor and gear train.
For achieving the above object, the technical solution adopted in the present invention is: a kind of electrically-controlled valve gear drive of dislocating and resetting, described electrically-controlled valve comprises motor, gear drive, valve rod and spool, described gear drive comprises train of reduction gears, the low speed end tooth wheel of described train of reduction gears is assemblied on the described valve rod, it is characterized in that, the low speed end tooth wheel of described train of reduction gears is tooth sector, and, when described tooth sector respectively during the double dislocation at inferior low speed gear, described spool just in time is in the opening and closing state; In addition, described gear drive also comprises the rotary motion mechanism that the tooth sector that makes dislocation resets, when described tooth sector after a certain side and time low speed gear break away from engagement, at least when inferior low speed gear began to reverse, described rotary motion mechanism can impel the tooth sector revolution and mesh again with inferior low speed gear.
Technique scheme is that the low speed end tooth of train of reduction gears in the prior art is taken turns the improvement of carrying out, and low speed end tooth wheel is improved to the tooth sector with limited working pressure angle.When valve closing or after opening, described tooth sector promptly breaks away from engagement with inferior low speed gear because of turning over effective engagement corner at inferior low speed gear one lateral dislocation.At this moment, interlock between motor and the valve rod disconnects, and motor can freely turn round, and can be because of the stall of spool stall.When needs open or close valve, the counter-rotating of control circuit control motor.When inferior low speed gear begin the counter-rotating, tooth sector resets in rotary motion mechanism effect turning down, promptly meshes again with inferior low speed gear.Tooth sector opens or closes valve under the driving of inferior low speed gear then.After opening or closing valve, described tooth sector turns over effective engagement corner in the other direction, dislocates again at the opposite side of inferior low speed gear.
Obviously, technique scheme has realized gear drive disconnection transmission at the appropriate time by the alteration of form that the low speed end tooth is taken turns, and the setting of rotary motion mechanism has realized the interlock of realization again that driving mechanism is waited when needed.Finally effectively avoided motor stall problem.Thereby problems such as the motor that the motor stall directly brought burns, teeth break have been solved.And the more important thing is that this improvement structure provides condition for the application of plastic gear.This not only can directly reduce the cost of material of gear train, and the processing cost of plastic gear is compared with metal gear also and significantly reduced.We can say that this improvement is the once change in electrically-controlled valve field.
In technique scheme, the effect of the rotary motion mechanism of described tooth sector be when tooth sector behind a certain lateral dislocation of inferior low speed gear, when needs conversion spool state, tooth sector revolution is resetted, promptly the inferior low speed gear with counter-rotating meshes again.Purpose is that the driving mechanism that disconnects transmission proper time is linked in needs again.Based on this purpose, be not difficult to expect, described rotary motion mechanism should comprise two identical driver parts, perhaps only comprise a driver part, but comprise two driving parts, drive to be responsible for the revolution when two dislocations of inferior low speed gear of described tooth sector respectively, or parts, but have the function of bi-directional drive.Described driver part can be spring, shell fragment or other any parts or mechanism that can produce pushing tow, tractive or twisting action.Described rotary motion mechanism should guarantee to have an effect when inferior low speed gear begins to reverse at least.
According to the mechanism of having an effect, the rotary motion mechanism of described tooth sector can be divided into two kinds: a kind of is the mechanism that has an effect immediately when needed, such as the mechanism that is triggered its action by the revolution of inferior low speed gear.Want complicated on this mechanism structure relatively, will comprise trigger component at least and make the rotating power unit of tooth sector, described trigger component can be a mechanical part, also can be a kind of electronic component with measuring ability.Certainly complicated structure increases is not only cost of material, and processing cost also makes troubles to dismounting, so unless in very high-grade equipment, generally do not advise adopting this rotary motion mechanism.Another kind is the mechanism of continuous action, and such as the elastic member that resiliently deformable can take place, in the certain corner before described tooth sector and time low speed gear are about to break away from engagement, described tooth sector begins to act on makes it to take place resiliently deformable on the elastic member.Touch described elastic member from described tooth sector, extremely described tooth sector revolution also breaks away from during the described elastic member, and described elastic member continues described tooth sector is had an effect.Comprise during this tooth sector and elastic member connect the back during the tooth sector dislocation, described tooth sector dislocation back time low speed gear be rotated further during, keep the spool state after the motor stall during, inferior low speed gear revolution back to described tooth sector break away from before the elastic member during.Continuous action formula revolution driver part is simple relatively, easy for installation, only needs that elastic member one end or certain part are assemblied in suitable position and gets final product.But during described tooth sector dislocation back time low speed gear is rotated further, will have the noise that gear clashes into mutually.
Gear drive of the present invention can divide two kinds of schemes by the assembling form of described tooth sector on valve rod.First kind of scheme is that tooth sector fixedly is assemblied in common solution on the described valve rod, and tooth sector described in the another kind of scheme adopts the free-standing assembling form, is the improvement project of making on the basis of first kind of scheme.
In first kind of scheme, described tooth sector equals the open and close phase angle of described valve rod with respect to effective engagement corner of inferior low speed gear.Wherein, the open and close phase angle of described valve rod is meant described spool rotational angle of described valve rod during conversion between the Kai Heguan two states; Described effective engagement corner is meant that the top circle scope that changes time low speed gear over to from tooth sector one side tooth begins to produce the angle that tooth sector turns over described in the process of top circle scope of time low speed gear to its opposite side end tooth.
In this programme, because spool, valve rod and tooth sector link all the time, therefore, if realize turning round after tooth sector breaks away from time low speed gear, the opposite direction torque that the torque that rotary motion mechanism produces tooth sector must section produces tooth sector greater than spool and valve rod resistance.This conditional decision the bigger driver part of necessary working strength, its indirect effect is the increase of cost.In addition, if adopt continuous action formula rotary motion mechanism, because rotary motion mechanism has begun described tooth sector is produced gyroscopic action before tooth sector and time low speed gear break away from engagement, from rotary motion mechanism begin to tooth sector produce as the time spent to last tooth sector in a period of time with respect to inferior low speed gear dislocation, described low speed gear not only needs to overcome the opposing torque that the resistance of valve rod and spool brings, and must overcome the opposing torque that rotary motion mechanism produces simultaneously.The condition that the torque that the described rotary motion mechanism of saying in conjunction with the front produces tooth sector need be satisfied as can be known, when adopting continuous action formula rotary motion mechanism, must use the above motor of motor power (output) twice commonly used can make the electrically-controlled valve proper functioning.This not only can increase the loss of electric energy, has increased the cost of motor too again.
Use the equipment of electrically-controlled valve at some, in gas meter, need be with valve closing when dead battery.Therefore, the energy-storage travelling wave tube of electric capacity one class can be set in control circuit generally, can charge to it when battery has electricity, when battery electric quantity used up, energy-storage travelling wave tube utilized the electric energy starting motor of its storage that electrically-controlled valve is closed.When having to use high power motor, in these equipment, equally also have to use more jumbo energy-storage travelling wave tube.This has increased cost again undoubtedly.
At the above-mentioned deficiency in first kind of scheme, the present invention has made improvement again on the basis of first kind of scheme, a kind of improvement project below having proposed.
This improvement project and first kind of scheme are basic identical, also be to adopt tooth sector to take turns as the low speed end tooth, institute's difference is, described tooth sector is non-directly to be fixed on the described valve rod, but on valve rod an angle free to rotate, this free rotational angle is enough to guarantee that described tooth sector and valve rod do not link before described tooth sector meshes with inferior low speed tooth again.
The advantage of improvement project is like this, and in realizing the tooth sector reseting procedure, described rotary motion mechanism does not need to overcome valve rod and spool resistance, rotates and gets final product and only need promote tooth sector self.Because it is very little that the resistance that tooth sector self exists is compared with valve rod and spool resistance, so can select the very little rotary motion mechanism of turning power in this improvement project for use, such as tiny spring or very weak shell fragment.Than first kind of scheme, this programme has wider Applicable scope, and can effectively save cost.And the more important thing is, in this improvement project, can select motor for use, and can not remove to consider to adopt more powerful motor because of the setting of rotary motion mechanism by conventional criteria of the prior art.In like manner, be applied in when it in equipment such as gas meter, relatively also fully can throttle down than the energy-storage travelling wave tube of small capacity.
Here it should be noted that in this improvement project, because the existence of free rotational angle, if described tooth sector still equals the open and close phase angle of described valve rod with respect to effective engagement corner of inferior low speed gear, is the complete switch that can not realize valve.In this improvement project, described effective engagement corner should equal the open and close phase angle and the free rotational angle sum of described valve rod.
Described tooth sector can be realized by a variety of assembly structures with respect to the free rotational angle of valve rod.Can divide two classes substantially, the first kind is aimed at the axle and the cooperating structure in hole, and such as arc shaft shoulder cooperation concentric arcuate axis hole, and the arc round angle in hole is greater than the arc round angle of axle.For instance, described valve rod upper end is the arc shaft shoulder, and the arc axis hole that cooperates is with it established in the center of circle of described tooth sector.Second class is additional limit structure, and most typical structure is a projection and the cooperating of chute in this class.Such as, described tooth sector loose fit is sleeved on the described valve rod, the limit structure that cooperatively interacts is set respectively on described valve rod and tooth sector simultaneously.Specifically, spacing block set is set on valve rod, and the circumferential limit sliding chutes that extends in the edge of matching with described spacing block set is set on the tooth sector, the sliding scale of described spacing block set in described limit sliding chutes promptly is the free slewing area of tooth sector.Generally speaking, no matter adopt which kind of assembly structure to realize the rotating freely for angles of tooth sector, all need to meet the following conditions: one, described tooth sector are rotatable on described valve rod, its two, the rotatable angle of described tooth sector on described valve rod is limited.
Certainly, also can improve, make valve rod with respect to a spool angle free to rotate from the assembly structure between described valve rod and the spool.This improvement can reduce the burden of rotary motion mechanism to a certain extent, but rotary motion mechanism still need overcome the surface friction drag between valve rod and the Sealing.Effect is compared not good enough with above-mentioned improvement project.
By above description as can be known, gear drive of the present invention mainly is applicable to rotational valve core formula electric control valve, also is applicable to the moving valve core formula electric control valve of valve rod open and close phase angle less than 360 degree.
Description of drawings
Fig. 1 is the external structure schematic representation of common electrically-controlled valve.
Fig. 2 is the internal structure schematic representation of common electrically-controlled valve.
Fig. 3 is a kind of embodiment structural representation of first scheme of the present invention.
Fig. 4 is spring-piece type rotary motion mechanism assembly relation schematic representation among the present invention.
Fig. 5 is tension spring type rotary motion mechanism assembly relation schematic representation among the present invention.
Fig. 6 is torsional spring type rotary motion mechanism assembly relation schematic representation among the present invention.
Fig. 7 is the clockwise 90 degree revolved views of the right elevation of Fig. 6.
Fig. 8 is the fixed structure schematic representation of torsional spring type rotary motion mechanism on the gear-box upper cover plate.
Fig. 9 is Fig. 8 centre circle A part enlarged view.
Figure 10 is a tooth sector reset mode schematic representation when beginning throttle down in the present invention's first scheme.
Figure 11 is in the off-position view for the present invention's first scheme middle fan generating gear.
Figure 12 is tooth sector reset mode schematic representation when beginning to open valve in the present invention's first scheme.
Figure 13 is in out a view for the present invention's first scheme middle fan generating gear.
Figure 14 is the swing state schematic representation after the tooth sector dislocation in the gear drive of the present invention.
Figure 15 is a kind of embodiment structural representation of improvement project of the present invention.
Figure 16 is tooth sector and valve rod assembly relation schematic representation in the improvement project of the present invention.
Figure 17 closes valve for tooth sector in the improvement project of the present invention is in and plays the step view.
Figure 18 is in a kind of ultimate state schematic representation in the off-position for tooth sector in the improvement project of the present invention.
Figure 19 is in another kind of ultimate state schematic representation in the off-position for tooth sector in the improvement project of the present invention.
Figure 20 plays the step view for tooth sector in the improvement project of the present invention is in out valve.
Figure 21 is in out a kind of ultimate state schematic representation in the position for tooth sector in the improvement project of the present invention.
Figure 22 is in out another kind of ultimate state schematic representation in the position for tooth sector in the improvement project of the present invention.
Figure 23 is in out perspective effect figure under the state for tooth sector in the improvement project of the present invention.
Figure 24 is in perspective effect figure under the off-position state for tooth sector in the improvement project of the present invention.
Figure 25 realizes the assembly structure schematic representation of the free rotational angle of tooth sector for projection cooperates chute.
Figure 26 is that arc axis hole cooperates arc axle to realize the assembly structure schematic representation of tooth sector rotating freely for angles.
Embodiment
Be example with the electric-controlled ball valve below, exemplify two kinds of relative embodiment preferred, and how the of the present invention two big schemes that specify in conjunction with the accompanying drawings realize the dislocation of driving mechanism and reset function.
With reference to Fig. 1,2, in the prior art, common electric-controlled ball valve mainly comprises motor 6, train of reduction gears 5, valve body 4, valve rod 8 and spool 9 five macrostructures composition, and wherein said motor 6 and train of reduction gears 5 are separately positioned in electric case 2 and the gear-box 1.Described motor 6 is connected with control circuit by lead 3, and is controlled its commentaries on classics, stopped and sense of rotation by control circuit.The speed end gear of described train of reduction gears 5 is installed on the motor output shaft, and the low speed end tooth wheel 7 of described train of reduction gears 5 is assemblied on the valve rod 8.The torque of described motor 6 is passed to valve rod 8 with slow-speed of revolution form after increasing the arm of force step by step through train of reduction gears, drives spool 9 by valve rod 8 and rotates the open and close valve.
With reference to Fig. 3, in electrically-controlled valve of the present invention, the low speed end tooth wheel of described train of reduction gears 5 is tooth sector 11, and, described tooth sector 11 equals the open and close phase difference of described valve rod 8 with respect to effective engagement corner R of inferior low speed gear 10, that is to say, because spool 9 links by valve rod 8 with tooth sector 11, along with described tooth sector 11 position of opening shown in the dotted line from figure forwards the off-position shown in the solid line to, described spool 9 just turns to the throttle down state from the state of opening valve, and vice versa.Be not difficult to expect that in the present invention, except effective working pressure angle R of described tooth sector need equal the switch phase declinate of described spool 9, described tooth sector 11 also must be corresponding with described spool 9 at the rigging position that makes progress in the week of valve rod 8.Its corresponding relation is, described spool 9 just in time is in open mode when tooth sector 11 is among the figure opening shown in the dotted line, and described spool 9 just in time is in closed condition when tooth sector 11 is among the figure opening shown in the solid line.
For the tooth sector that makes dislocation automatically resets, provided a kind of specific implementation of continuous action formula rotary motion mechanism among this figure when needs open or close valve.Promote respectively to reset by two identical revolution shell fragments 14 of structure at the tooth sector 11 of inferior low speed gear 10 double dislocations.The two ends of described revolution shell fragment 14 are respectively fixed end 15 and effect end 13, described fixed end 15 is fixed on the gear-box base plate 16, the side 12 of 13 corresponding described tooth sector is held in described effect, and is positioned under nature in the border of rotation path of described tooth sector 11.When described tooth sector 11 was driven by inferior low speed gear 10, before its side arrived the border, its side 12 has promptly begun to compress revolution shell fragment effect end 13 occured bending and deformation the revolution shell fragment, up to described tooth sector 11 dislocations.When tooth sector under the dislocation state, described revolution shell fragment 14 keeps one to described tooth sector all the time makes it rotating thrust.The effect end 13 of certain described revolution shell fragment is not necessarily wanted corresponding side at described tooth sector 11.Also can be on tooth sector 11 or below setting put forth effort the thrust that projection or projection 17 are accepted revolution shell fragment effect end, as shown in Figure 4.The described effect end 13 suitable circular arc bent angles that are provided with are to reduce to act on the surface friction drag of end and tooth sector side.It is to adopt screw that the means of fixation of described fixed end 15 can have multiple, fairly simple mode, as shown in this figure, perhaps fixes by the draw-in groove that is complementary with the fixed end shape.Spring-piece type rotary motion mechanism characteristics are: revolution reliability height, can freely select the shell fragment of different-thickness according to the steering resistance size, and Applicable scope is extremely wide.
With reference to Fig. 5, this figure has provided a kind of specific implementation of tension spring type rotary motion mechanism, and in this example, described rotary motion mechanism is an extension spring 20, and its two ends are installed in respectively on gear-box base plate and the tooth sector, can be called fixed end and effect end.Wherein, fixed end 18 mounting points suit to be located on the line 19 in the described tooth sector center of circle and time low speed gear center of circle.According to the character of extension spring, fixed end 18 positions of described extension spring are being excellent away from described tooth sector center of rotation 22 as far as possible.The mounting point of the effect end 21 of described extension spring is suitable to be located on the center line 23 of described tooth sector, and is excellent with as close as possible tooth sector center of rotation 22.The advantage of tension spring type rotary motion mechanism is that only parts can realize that the bilateral of tooth sector resets;
Fig. 6, shown in Figure 7 is a kind of specific implementation of torsional spring type rotary motion mechanism, torsion spring 26 coaxial described tooth sector 11 tops that are arranged on shown in the figure, its two arm 25,27 end is for reversing two effect ends 28 of tooth sector respectively from both direction, 29, the bending downwards of the end of effect described in this figure, under the normal state, described torsion spring 26 is by two limited post 24 tensioners of respectively corresponding its two arm, the effect end of described torsion spring lays respectively in the border, both sides of rotation path of described tooth sector 11, and the side 12 of corresponding described tooth sector planar.Described torsion spring 26 can be arranged on gear-box base plate 16 or the upper cover plate 30 according to the height of low speed end tooth wheel rigging position.Be example to be arranged on the upper cover plate 30 among this figure, Fig. 8, Fig. 9 have specifically showed its assembling condition on upper cover plate 30.Torsional spring type rotary motion mechanism characteristics are: except that the advantage that has spring-piece type and tension spring type rotary motion mechanism concurrently, also have the easy advantage of assembling, only need be inserted in the relevant position and get final product.
With reference to Figure 10-13, this four figure is that example is divided the dislocation of the described driving mechanisms of four steps explanation the present invention's first scheme working procedure that resets with the torsion spring.The first step supposes that valve is in open mode, and described tooth sector is dislocated above inferior low speed gear, and we are referred to as out the position with described tooth sector this moment phase place of living in, now desire throttle down, so the forward starting motor, and inferior low speed gear clockwise rotates.Described tooth sector drives valve rod under the effect of revolution torsion spring upper arm and spool rotates counterclockwise and realize engagement with inferior low speed gear, as shown in figure 10.In second step, described tooth sector is dislocated below inferior low speed gear after turning over angle R counterclockwise under the drive of inferior low speed gear, promptly breaks away from engagement with inferior low speed gear, and described tooth sector this moment phase place of living in is referred to as off-position.At this moment, described spool is closed, and the underarm of described torsion spring is pushed away limited post by tooth sector.Under the effect of torsion spring, the clockwise side tooth pressure of described tooth sector is to inferior low speed gear.As shown in figure 11.Thoroughly close in order to ensure spool, continue motor to be powered after a break time motor outage stall.The 3rd step, when needs are opened valve, the back-to-back starting motor, inferior low speed gear reverses counterclockwise, described tooth sector clockwise rotates under the effect of torsion spring underarm and meshes again with inferior low speed gear, and described valve rod and spool rotate with tooth sector and begin to open valve, as shown in figure 12.In the 4th step, described tooth sector enters out the position turn over angle R clockwise under inferior low speed gear counter-rotating drives after.At this moment, described spool is opened, and the upper arm of described torsion spring is pushed away limited post by tooth sector.Under the effect of torsion spring, described tooth sector is counterclockwise side tooth pressure is to inferior low speed gear, to prepare next throttle down, as shown in figure 13.Open fully in order to ensure spool, continue motor to be powered after a break time motor outage stall.
With reference to Figure 14, according to the description of front as can be known, when adopting continuous action formula rotary motion mechanism, described tooth sector is behind a certain lateral dislocation of inferior low speed gear, tooth sector is pressed to time low speed gear under the effect of rotary motion mechanism, keep off-position or open the position under the support of inferior low speed gear cylindrical.But inferior low speed gear cylindrical be rugged teeth and be not smooth circular arc, that is to say, described tooth sector open the position or off-position is not a definite phase angle, but in an angular range r the continuous angle domain of change.In this case, during the design valve, should guarantee that spool has the rotation complementary angle that its value is not less than r under the state of throttle down, rotating the residing any phase place of complementary angle scope inner spool at this all can throttle down.
Figure 15-the 24th, the specific implementation of gear drive improvement project of the present invention, this scheme has been improved the defective of selecting for use of valve rod, spool resistance limits rotary motion mechanism and motor in first scheme, has also solved the problem of the accurate throttle down of tooth sector switch bit influence of change spool.Below device for revolving and driving described in each figure all be example with the torsion spring.
With reference to Figure 15, described tooth sector 11 is sleeved on by axis hole 33 on the shaft shoulder of described valve rod 8 upper ends, described axis hole 33 and described shaft shoulder loose fit.The circumference of described axis hole is provided with a pair of fan groove 31, and the fan-shaped center of circle of described fan groove 31 is concentric with described axis hole 33.The fan-shaped bump 32 that the described shaft shoulder is provided with two corresponding respectively two fan grooves 31 and cooperates with it.The segment angle of described fan groove 31 is greater than the segment angle of described fan-shaped bump 32.The described just tooth sector of declinate r1 between the two is with respect to the free rotational angle of valve rod.Therefore in this legend, described tooth sector equals the difference r1 that valve rod switch phase declinate adds the segment angle of the above fan groove 31 and described fan-shaped bump 32 with respect to effective engagement corner R 1 of inferior low speed gear 10.We represent valve rod switch phase declinate with alphabetical Q at this, and above-mentioned relation can be R1=r1+Q with equation expression then.
In the present embodiment, if described fan groove does not penetrate the thickness of whole tooth sector, then described axis hole 33 has complete circumference in certain thickness, helps improving the assembling stability of tooth sector at valve rod like this.Also increased simultaneously the intensity of tooth sector, as shown in figure 16.
Figure 17-22 has illustrated the working method that has the tooth sector assembling scheme of free rotational angle with respect to spool by the action sequencing.This six width of cloth figure has showed six important process states of tooth sector in this improvement project respectively.Press the sequencing of figure, we are referred to as state one successively to state six.Wherein state the two, the 3rd, two of tooth sector kinds of ultimate states during valve closing, two kinds of ultimate states of tooth sector when state five, six is valve open.In this six width of cloth figure, the limit structure of described tooth sector is selected the fan groove form, therefore in the drawings tooth sector has been done and has partly been dissectd the technique of painting.
With reference to Figure 17, described state one is represented the finishing of warming-up exercise of throttle down.Specifically, under valve was in open mode, desire was closed it, was just changeed by the control circuit starting motor, and inferior low speed gear clockwise rotates, and tooth sector rotates counterclockwise with inferior low speed gear under the effect of torsion spring upper arm.The clockwise side side of the fan groove that is provided with on described tooth sector is adjacent to the fan-shaped bump on the valve rod, as is rotated further, and described tooth sector will begin to drive valve rod and valve core rotation.That is to say that at this moment, described tooth sector has performed the preparatory work of throttle down.At this moment, described tooth sector is realized engagement with inferior low speed gear; And described torsion spring upper arm also is about to touch the upper limit post, with the effect that loses fan tooth punching wheel.Described tooth sector this moment phase place of living in, we can be referred to as to close valve and play step.
In the process that described tooth sector does homework, described tooth sector is in free rotary state all the time with respect to valve rod and spool.In other words, before tooth sector was realized resetting, the resistance of described valve rod and spool was inoperative to torsion spring, and the turning power of described torsion spring only need overcome the inertia of tooth sector self gravitation generation and the surface friction drag between tooth sector and the valve rod gets final product.And these resistances are quite faint.
With reference to Figure 18,19, on behalf of the task of throttle down, described state two, three finish.Specifically, after the preparatory work of throttle down was finished, motor remained in operation, and described tooth sector drives valve rod and spool throttle down gradually under the driving that low speed gear rotates counterclockwise.Rotate counterclockwise the top circle scope of releasing time low speed gear to its clockwise side tooth by the tooth item of a certain teeth of inferior low speed gear for the first time when tooth sector, described tooth sector is dislocated below inferior low speed gear, valve rod and spool counterclockwise rotate and reach capacity, and its state as shown in figure 18.According to R1=r1+Q, as can be known, thorough low the closing of described spool this moment.At this moment, described tooth sector pushes away the lower limit post with the underarm of torsion spring under inferior low speed gear effect, and the warping force of torsion spring all acts on the tooth sector by its end.Really close for guaranteeing valve, control circuit will continue power supply to motor, inferior low speed gear continues to clockwise rotate, pushing tow sector teeth tooth breaks away from the clockwise side tooth of tooth sector on described low speed gear, described tooth sector clockwise rotates under the effect of torsion spring, its clockwise side tooth hits the next teeth of time low speed gear, and its state as shown in figure 19.Before motor shut down, along with each teeth of inferior low speed gear contact the clockwise side tooth of tooth sector successively, described tooth sector will conversion back and forth between state two and state three, is the equifrequent swing state.Because back and forth in the process of conversion, valve rod and spool do not rotate between state two and state three for the existence of free rotational angle, described tooth sector, described valve keeps closed condition.So we claim described tooth sector between state two, state three and state two and state three in arbitrary intermediateness residing phase place be off-position.
With reference to Figure 20, the finishing of warming-up exercise of valve opened in four representatives of described state.Specifically, valve closing, after motor shut down, described tooth sector was in off-position.When needs are opened valve, the starting motor counter-rotating, inferior low speed gear rotates counterclockwise, and tooth sector clockwise rotates with inferior low speed gear under the effect of torsion spring underarm.The counterclockwise side side of the fan groove that is provided with on described tooth sector is adjacent to the fan-shaped bump on the valve rod, and described tooth sector has promptly performed the preparatory work of opening valve.At this moment, described tooth sector is realized engagement with inferior low speed gear; And described torsion spring underarm also is about to touch the lower limit post, with the effect that loses fan tooth punching wheel.Described tooth sector phase place of living in this moment can be referred to as out valve and play step.As be rotated further, described tooth sector will begin to drive valve rod and spool is opened valve.
With reference to Figure 21,22, the task that valve is opened in described state five, six representatives is finished.Described tooth sector is opened the process of valve and is compared basic identical with pass valve process.The activity direction of different is each movable part is just opposite.Described tooth sector clockwise rotates, release the top circle scope of time low speed gear for the first time by the tooth item of a certain teeth of inferior low speed gear when its counterclockwise side tooth, fan tooth is dislocated above inferior low speed gear, and described valve rod and spool clockwise rotate and reach capacity, and its state as shown in figure 21.This moment, valve was opened fully.The teeth of pushing tow tooth sector end tooth turn over the end tooth of tooth sector on described low speed gear, and described tooth sector reverses under the effect of torsion spring counterclockwise, and its end tooth hits the next teeth of time low speed gear, and its state as shown in figure 22.Before motor shut down, described tooth sector will conversion between state five and state six.Described tooth sector residing phase place in arbitrary intermediateness between state five, state six and state five and state six can be referred to as out the position.
With reference to Figure 23,24, electrically-controlled valve during normal use, the most of the time valve is all handled the state of opening or closing, at this moment, described tooth sector is in out position or off-position, for representing this two kinds of working staties more intuitively, provides the perspective effect figure of this two states underdrive mechanism at this.
With reference to Figure 25, in this example, described tooth sector 11 is sleeved on described valve rod 8 upper ends by the axis hole loose fit, and the axis hole cylindrical of described tooth sector is circumferentially with a chute 35, described valve rod is provided with projection 34, and described projection 34 can be along circumferential slippage in described chute 35.
With reference to Figure 26, in this example, the axis hole of described tooth sector 11 is arc, and the shaft shoulder slot cross-section of described valve rod 8 upper ends also is arc, and the arc round angle k of the arc axis hole of described tooth sector is greater than the arc round angle z in the arcuate slots cross section of the described valve rod 8 upper end shaft shoulders.Both declinates are the free rotational angle r1 of described tooth sector with respect to valve rod.
What should be noted that is that the various embodiments of two big embodiments that more than exemplify and concrete parts only be a kind of concrete manifestation form of the present invention's first scheme and improvement project, and technology contents involved in the present invention never only limit to this.Under the guidance of two schemes of the present invention, any specific embodiment of other that can make is all within protection domain of the present invention.
Claims (8)
1. the electrically-controlled valve gear drive that can dislocate and reset, described electrically-controlled valve comprises motor (6), gear drive, valve rod (8) and spool (9), described gear drive comprises train of reduction gears (5), the low speed end tooth wheel (7) of described train of reduction gears (5) is assemblied on the described valve rod (8), the low speed end tooth wheel (7) of described train of reduction gears (5) is tooth sector (11), when described tooth sector (11) respectively during double dislocation at inferior low speed gear (10), described spool just in time is in the opening and closing state, described gear drive also comprises the rotary motion mechanism that the tooth sector (11) that makes dislocation resets, it is characterized in that, described tooth sector has a free rotational angle (r1) with respect to described valve rod, and described tooth sector (11) equals opening of described valve rod with respect to effective engagement corner (R1) of inferior low speed gear (10), close phase angle (Q) and described free rotational angle (r1) sum.
2. the electrically-controlled valve gear drive of dislocating and resetting according to claim 1, it is characterized in that, described tooth sector (11) is sleeved on described valve rod (8) upper end by axis hole (33) loose fit, have the fan groove concentric (31) on the circumference of described axis hole (33) with described axis hole, described valve rod upper end is provided with the fan-shaped bump (32) that cooperates with described fan groove (31), and the difference of the segment angle of the segment angle of described fan groove (31) and described fan-shaped bump (32) equals described free rotational angle (r1).
3. the electrically-controlled valve gear drive of dislocating and resetting according to claim 2 is characterized in that, described fan groove (31) and described fan-shaped bump (32) are two, and are symmetrical arranged according to the center of circle.
4. the electrically-controlled valve gear drive of dislocating and resetting according to claim 1, it is characterized in that, described rotary motion mechanism is a torsion spring (26), and the two arm ends (28,29) of described torsion spring (26) are the dual-side of corresponding described tooth sector (11) respectively.
5. the electrically-controlled valve gear drive of dislocating and resetting according to claim 1 is characterized in that, described rotary motion mechanism is two shell fragments (14) of difference corresponding described tooth sector (11) dual-side.
6. the electrically-controlled valve gear drive of dislocating and resetting according to claim 1, it is characterized in that, described rotary motion mechanism is an extension spring (20), one end (18) of described extension spring is positioned on the line (19) in the described tooth sector center of circle and time low speed gear center of circle, and the other end (21) is positioned on the segment angle center line (23) of described tooth sector.
7. according to each described electrically-controlled valve gear drive of dislocating and resetting of claim 1-6, it is characterized in that the gear material of described train of reduction gears is plastics.
8. according to each described electrically-controlled valve gear drive of dislocating and resetting of claim 1-6, it is characterized in that described electrically-controlled valve is a ball valve.
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| CN2009101553699A CN101725753B (en) | 2009-12-21 | 2009-12-21 | Dislocable and resettable gear transmission mechanism of electric control valve |
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| CN2009101553699A CN101725753B (en) | 2009-12-21 | 2009-12-21 | Dislocable and resettable gear transmission mechanism of electric control valve |
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| CN101725753A CN101725753A (en) | 2010-06-09 |
| CN101725753B true CN101725753B (en) | 2011-12-07 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742705B (en) * | 2013-10-11 | 2016-08-17 | 阮迪荣 | A kind of drive mechanism for mechanical type timing valve |
| CN103742704B (en) * | 2013-10-11 | 2016-07-20 | 阮迪荣 | A kind of mechanical type timing valve |
| CN103742703B (en) * | 2013-10-11 | 2016-08-17 | 阮迪荣 | A kind of valve switch mechanism for mechanical type timing valve |
| WO2015074356A1 (en) * | 2013-11-25 | 2015-05-28 | 慈溪市三洋电子有限公司 | Ball valve |
| CN105587827A (en) * | 2014-10-20 | 2016-05-18 | 杭州鄂达精密机电科技有限公司 | Wheel gear box |
| CN105587826A (en) * | 2016-02-29 | 2016-05-18 | 虞家华 | Micro-gear rotary switch device |
| CN106402421B (en) * | 2016-11-01 | 2019-02-26 | 成都秦川物联网科技股份有限公司 | A kind of low pressure loss electromechanics ball valve and gas meter, flow meter |
| CN106439089B (en) * | 2016-11-18 | 2018-11-06 | 成都秦川物联网科技股份有限公司 | Two-way anti-blocking rotation mechanism, two-way blocking rotation electromechanics ball valve and gas meter, flow meter |
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| EP1457721A1 (en) * | 2003-03-13 | 2004-09-15 | Dell'orto S.P.A. | Throttle unit for internal combustion engines |
| CN200999878Y (en) * | 2007-01-10 | 2008-01-02 | 庄革 | Thread losting in-position indicating valve |
| CN201318497Y (en) * | 2008-12-08 | 2009-09-30 | 郑龙永 | Gas meter electrical controlled valve for rapidly closing the valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1457721A1 (en) * | 2003-03-13 | 2004-09-15 | Dell'orto S.P.A. | Throttle unit for internal combustion engines |
| CN200999878Y (en) * | 2007-01-10 | 2008-01-02 | 庄革 | Thread losting in-position indicating valve |
| CN201318497Y (en) * | 2008-12-08 | 2009-09-30 | 郑龙永 | Gas meter electrical controlled valve for rapidly closing the valve |
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| JP特开平8-156621A 1996.06.18 |
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